The Parvatha Ucchi Malai is a mythycal mountain believed to be near Ayotha Amirtha Gangai

Ayotha Amirtha Gangai

This Ayotha Amirtha Gangai is a mythical river found in Akilattirattu Ammanai the source of Ayyavazhi mythology.It was located in Ayotha Amirtha Vanam the place where, Thirumal through the instrumentality of the Seven Virgins give birth to the Santror Makkal. ...

 as per Akilattirattu Ammanai

Akilattirattu Ammanai

Akilathirattu Ammanai , also called Thiru Edu , is the main religious text of the Tamil belief system Ayyavazhi...

 the source of Ayyavazhi mythology

Ayyavazhi mythology

Ayyavazhi mythology is the mythology of the growing South Indian religious faith and a sect of Hinduism known as Ayyavazhi. The main source of Ayyavazhi mythology is the Ayyavazhi scripture, Akilattirattu Ammanai, and its supplement, Arul Nool. The Akilattirattu Ammanai is a recitation by Mayon to...

.

As per the tradition after the Krishna

Krishna

Krishna is a central figure of Hinduism and is traditionally attributed the authorship of the Bhagavad Gita. He is the supreme Being and considered in some monotheistic traditions as an Avatar of Vishnu...

 Avatar

Avatar

In Hinduism, an avatar is a deliberate descent of a deity to earth, or a descent of the Supreme Being and is mostly translated into English as "incarnation," but more accurately as "appearance" or "manifestation"....

 the Avatara Chatam (body taken for the avatar) of Vishnu

Vishnu

Vishnu is the Supreme god in the Vaishnavite tradition of Hinduism. Smarta followers of Adi Shankara, among others, venerate Vishnu as one of the five primary forms of God....

 was placed in this mountain. Then for the Vaikunda Avatharm again this body cleaned up and was taken into the sea by two sages, Kalai Muni and Gnana Muni. Then Ayya Vaikundar

Ayya Vaikundar

Ayya Vaikundar , according to Akilattirattu Ammanai , a scripture of the Ayyavazhi, was a Manu Avatar of Narayana, incarnated as Muthukutty or Mudisoodum Perumal, a Nadar of Swamithoppe, Tamil Nadu Ayya Vaikundar , according to Akilattirattu Ammanai (or Akilam), a scripture of the Ayyavazhi, was...

 incarnates in that body. There was also claims that it was Marunthuvazh Malai

Marunthuvazh Malai

The Marunthuvazh Malai also known as the Maruthuva Malai,nearer to VAIKUNDA PATHI forms the part and the southernmost tip of the Western Ghats....

 so stated in Akilam.